The best window seals, compared.
Top pick: Storm Patrol uPVC gasket, 25 m, black Best value: UPSEN D-profile foam seal, 10 m, white – 10 m at about £4.99, about £0.50 a metre, with 4.3 from 3,025 ratings, the largest review count in this set. Updated October 2026.
A window seal closes the gap where an opening window meets its frame, or it replaces the rubber that used to do that job. In a UK home that is usually a uPVC casement whose bubble seal has gone hard, or a timber or metal frame with no groove. You want the draught gone without a new window. The useful seal is the one whose profile matches the gap you measured, that springs back, and that still lets the handle lock. Too thick, and the window will not shut. Self-adhesive foam is the cheaper, shorter-life option Energy Saving Trust describes. A push-in gasket is the repair when the original rubber still has a groove. The [window seal buying guide](/hub/door-and-window-security/window-seal/sub/window-seal-buying-guide) is where measuring the gap sits, before you pick a profile from this table.
A window seal closes the gap where an opening window meets its frame, or it replaces the rubber that used to do that job.
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Personal buying guide
Question 1 of 2
What are you sealing?
Storm Patrol is a push-in rubber bubble for an existing uPVC groove, listed for frames of 3–5 mm, on a 25 m coil. You cut it with scissors and press it into the slot after the old seal is out. The amazon.co.uk line is 4.5 from 306 ratings, at about £20.18, and the listing says the seal is made in the United Kingdom. Reviewers used it to replace perished, flat or brittle seals, and at least one 25-year-old window set was quieter than with the degraded rubber. The bubble is deeper than an earlier Storm Guard seal one buyer had fitted, and a soak in hot water softened stiff lengths. Tight grooves are the recurring snag: one door seal would not go in by hand, and a plastic scraper or lubricant comes up in the reviews. The profile can sit thicker than the old seal, so the door stays stiff until the rubber settles, and fitting both sash and frame at once made one window hard to close.
Pros
Cons
Best for: Replacing a perished uPVC window or door gasket when you have measured a 3–5 mm groove.
Less suitable: A frame with no groove, and a sash you need to close easily on the same day you fit both sides.
Specifications
Common questions
Does this push into a uPVC groove?
It is a rubber bubble gasket, not stick-on tape. The listing says it fits frames, windows and doors from 3–5 mm and tells you to measure first. Reviewers pushed it into the existing slot.
Can a thicker bubble stop the door closing?
One reviewer found this profile a little thicker than the old seal, so the door was stiff until the rubber settled. Another sealed only one side first so the window would still close.
How long is the coil?
The title gives 25 metres. Some reviewers resealed several windows and still had length left. One buyer ran out and ordered a second coil.
Tarqite is a push-in EPDM gasket for a uPVC groove, and the three reviews on file say it is easy to fit once the old seal is out. One of those reviews covered a door and had enough length for that single job. Another reported a large difference to draughts and noise on one window, then ran out after that one large window. The listing does not agree with itself on length: the title says 6 m, the unit count and the included-components line say 8 m, and the item-length field says 80 cm. There is no foot width in millimetres, so you cannot match it to a groove before it arrives. The star line is 4.5 from 9 ratings, at about £7.89, which is too small a sample to treat as a stable result. No tear or groove-mismatch shows up in those three reviews.
Pros
Cons
Best for: A single uPVC window whose old gasket you can already pull out, if you measure the coil when it arrives.
Less suitable: A whole house of windows, or any order where the stated length has to be right before you start.
Specifications
Common questions
How long is the Tarqite coil?
The title says 6 m. Included components say 1 x 8 m, the unit count is 8.0 metre, and the item-length field is 80 cm. One of three reviews was only enough for one large window.
How does it fit?
It is a push-in gasket. The listing says to cut it with scissors, remove the old seal, clean the residue and press it into the groove. No foot width is given.
Is the star rating based on many reviews?
The listing shows 4.5 from 9 reviews. The saved file contains three of them, all short, so there is no stable complaint pattern beyond length.
The YANKUIRUI strip is a 9 mm by 6 mm EPDM D-seal, sold as two 3 m pieces that make 6 m, for a gap the listing puts at 3–6 mm. You cut it with scissors and stick it to the frame; there is no drilling. Across 2,938 amazon.co.uk ratings it sits at 4.4, at about £4.49, and it is the top pick in this set because the section and the gap are both printed and the review sample is large. Reviewers report a visible draught stopping on a warped uPVC window and on a poorly fitting door, and the D-profile compresses when the window shuts. One review mentions less outside noise on a door. The adhesive is the limit: it holds on a smooth painted frame and lifts on a dusty or uneven one, and some buyers replace the strip once the glue dries out. The same thickness can stop a door closing if you place it on the wrong angle, so a test offcut is worth doing, and some buyers found the section smaller than they expected.
Pros
Cons
Best for: A white uPVC or painted frame with a gap of about 3–6 mm, where you want a stick-on D-seal rather than a push-in gasket.
Less suitable: A perished seal that still sits in a uPVC groove, and a door that already closes tightly.
Specifications
Common questions
What gap does this D-seal state?
The listing states a suitable gap of 3–6 mm for a 9 mm by 6 mm D-profile. You get two pieces of 3 m, 6 m in total. Reviewers who found the section smaller than they expected were checking the size after it arrived.
Do I need tools to fit it?
The listing says there is no drilling or screwing. Scissors are enough to cut it. Reviews describe measuring, peeling the backing and sticking it to the frame.
Does the listing say it is waterproof?
Yes. The title and bullets call this EPDM tape waterproof. That is the seller’s claim. The listing file has no test certificate.
Bynsaer’s white D-foam is listed for a 3–5 mm gap, and the title’s 6 m is the length after the roll is split, so the unsplit coil is 3 m. At about £4.49 it matches the cheapest shelf price here, with 4.4 from 2,420 ratings. Reviewers have blocked draughts on doors, attic windows, patio doors and a loft hatch, and one split strip sealed the head of a casement that had a manufacturing gap. You get a strong grab on a frame washed with white spirit, and one summerhouse door held. The same thickness stops some doors closing fully. The backing tears after a short length and needs a knife to start again. Adhesive is the other limit: one prepared painted frame lost the strip after a day, and another window peeled later. One buyer wrote that they would staple it because the glue might not hold.
Pros
Cons
Best for: A cleaned painted frame with a gap of about 3–5 mm, if you split the roll and check the door still shuts.
Less suitable: A door that must latch without extra force, and a job that needs a reliable 6 m without splitting.
Specifications
Common questions
Is the coil really 6 m?
The title says 6 m. One reviewer notes that 6 m is the length after both halves are separated, so the unsplit roll is 3 m.
Will it stop a door closing?
The listing states a 3–5 mm gap. One reviewer found it too thick, and the door no longer closed fully. That reviewer treated the thickness as a fit issue, not a broken strip.
Does the backing peel cleanly?
Not always. One review says the backing tears after a short length and needs a knife to start again. Others report the strip peeling off the frame after a day or longer.
GUKOY’s tape is flat closed-cell foam, 6 mm wide and 3 mm thick, in two rolls that make 20 m, at about £6.99. The listing does not state a gap. Across 1,373 amazon.co.uk ratings it sits at 4.4. Reviewers stuck it to cleaned PVC and painted door frames, and one reel covered four doors when only the top and the handle side were sealed. It closes a slight gap, stops a rattle, and quietened a bedroom used for a games console, and a loft hatch stayed sealed without looking bulky. The 3 mm thickness is the limit you will hit on a larger crack: those gaps stayed draughty until the tape was doubled, and on doors that already fitted tightly the extra 3 mm stopped them closing. Once the backing is off it will not reposition, and on an inner frame it can peel and stick awkwardly. Buyers who cleaned with alcohol or white spirit did not report a widespread next-day failure.
Pros
Cons
Best for: A slight, even crack on a PVC window, a door jamb or a loft hatch, where 3 mm of foam is enough.
Less suitable: A gap much over 3 mm, and a door that already closes with no spare room.
Specifications
Common questions
What gap is this tape for?
The listing does not state a gap. It is 6 mm wide and 3 mm thick. Reviewers who had a larger window gap found it too thin unless they doubled it.
How much length is in the pack?
Two rolls, 20 m in total. One reviewer covered four doors with a single reel by sealing only the top and the handle side.
Can it stop a tight door closing?
Yes, if the door already fits closely. One reviewer could not close the doors after fitting it and had to accept a tighter, or unusable, shut.
UPSEN is a white EPDM D-seal, 9 mm wide and 6 mm thick, on one 10 m roll that splits into two 5 m lengths, for a gap the listing puts at about 3.5–5 mm. At about £4.99 it is the best value in this set: you get 10 m for 50p more than the 6 m coils at about £4.49. The amazon.co.uk line is 4.3 from 3,025 ratings, the largest sample here. Reviewers reported an immediate difference on gappy Victorian sash windows, and the strip stopped draughts on a front room, a door bottom edge and 30-year-old windows. One door-bottom strip was still in place after months of cold and damp. The adhesive is why it is not the top pick: strips peel and stand up, and the backing tears as you peel it. The section can be too thick for a smaller gap, and one buyer said it did not do the job. The spec table also lists a 4 mm width, which does not match the 9 mm bullet.
Pros
Cons
Best for: Several white windows or a door bottom with a gap of about 3.5–5 mm, when you want the most D-seal length for the money.
Less suitable: A gap under about 3.5 mm, and a frame where a previous stick-on strip has already lost its glue.
Specifications
Common questions
What size is the UPSEN strip?
The bullet gives 9 mm width and 6 mm thickness, for a gap of about 3.5–5 mm. One roll is 10 m, or 5 m times two if you split it. The spec table also lists thickness 0.6 cm.
Do reviewers say it stays stuck?
Mixed. One strip on a door bottom was still in place after months. Others say the strips peel and stand up, and that the backing tears as you peel it.
Is it too thick for a small gap?
One reviewer said it seals draughts but can be too thick for smaller gaps. The stated range is about 3.5–5 mm.
wordmouk is a flat transparent tape, 3 cm wide and 10 m long, and you stick it over a joint rather than compressing it in a gap. The listing states no compression gap. It is about £8.98, with 4.2 from 915 ratings. Reviewers used it on single glazing and on a child’s bedroom window to stop a winter draught, and one household took it off again for summer. A drop in outside noise was used as a sign the airflow was blocked, and one roll stayed on a door for six months and still looked acceptable. It is a poor seal for a door you still open: at least one pack was sticky on both sides. Firm tape is awkward in window-frame corners, adhesion varies between rolls, and one buyer saw no difference after fitting. The bullets say acrylic and the spec table says rubber, so the material is not settled on the listing.
Pros
Cons
Best for: A fixed window joint you want to cover for the heating season and peel off later.
Less suitable: A door or casement you still need to open, and any gap that needs a compressible seal.
Specifications
Common questions
Is this a compressible window seal?
No. It is a flat transparent tape, 3 cm by 10 m, stuck over a joint. The listing does not give a compression gap.
Can I use it on a door I still open?
One reviewer said the tape was sticky on both sides and told others not to buy it for doors they need to open. The same reviewer said it was fine on something that does not move.
Does the listing say it leaves residue?
The product questions ask about residue. The bullet says it adheres firmly without residue. Reviews do not confirm a clean peel beyond one person who removed it for summer.
Esufeir is a hollow rubber D-seal, not foam, listed for a 2.5–6 mm gap, and the title length is 6 m. The pack adds two adhesion aids, gloves and instructions, which you use to wipe the frame before sticking. amazon.co.uk shows 4.2 from 397 ratings, at about £7.99. One reviewer used the alcohol wipe and reported the strip still holding after six months of humidity and temperature changes. It has stopped draughts on a bowed window frame, a new back door and a conservatory door, and the rubber was thicker than the photos, which suited buyers who wanted less noise. A full perimeter on one back door made it very tight to close and strained the lock, so that buyer cut it back to one vertical strip. The paper backing takes the glue with it if you peel quickly, and some packs arrived with dried adhesive. The listing says cold weather can weaken the stick, one reviewer warmed the strip with a hairdryer, and the unit-count field says 1.0 metre, which does not match the 6 m title.
Pros
Cons
Best for: A door or window gap of about 2.5–6 mm where you want rubber rather than foam, and you will wipe the frame first.
Less suitable: A door you seal on every edge and still need to lock easily, and a cold fit with no way to warm the strip.
Specifications
Common questions
What gap does Esufeir state?
The title states a 2.5–6 mm gap for a hollow D-shape rubber strip. The title length is 6 m. The unit-count field says 1.0 metre.
What is in the pack?
The listing includes the seal, two adhesion aids, disposable gloves and instructions. One reviewer used the alcohol wipe and reported the strip still holding after six months.
Can it make a door hard to lock?
One reviewer sealed the whole back door and found it very tight to close, with strain on the lock. They cut the seal back to one vertical strip.
The WanderGo strip is a white T-shape, 6 m of polyethylene, and one reviewer fitted it in about 10 minutes. It has stopped a large draught on a garage-to-utility door and on dropped patio doors, and a living-room window was reported as quieter and less dusty. The listing does not state a gap, so you cannot check the size against a millimetre measurement before you order. Across 901 amazon.co.uk ratings it sits at 4.0, the lowest star line in this set, at about £9.99. The backing paper is the complaint that keeps returning: it is hard to peel, it rips the strip, and it often takes the glue with it, so lengths are wasted. Adhesive is described on one edge, and one buyer added tape on the other edge before the strip would hold. A few people wanted it 2–3 mm thicker. Once the backing is actually off, some say it sticks and the room feels warmer.
Pros
Cons
Best for: A white frame with a large draught, if you are willing to peel the backing slowly.
Less suitable: Anyone who wants a stated millimetre gap, or a strip that peels cleanly in one go.
Specifications
Common questions
Is a gap size stated?
No. The listing describes a 6 m white T-shape strip for windows and doors, and it does not give a millimetre gap.
Why do reviews mention the backing paper?
Several reviewers could not peel the backing without ripping the strip or pulling the glue off. Once the backing was off, some said it stuck and cut the draught.
Is the adhesive on both edges?
One reviewer found double-sided tape on only one edge and added tape on the other edge before the strip would hold on their window.
Scores compare the nine amazon.co.uk listings on this page. Prices, stars and review counts are the figures saved on 15 October 2026. There is no laboratory test, and the seals were not fitted for this score. The scores do not rank the wider UK market. Each score is out of 100, in the four blocks below.
Review line
40%Star points run from 4 at 4.0 stars to 12 at 4.5. Volume points use the listing count, from 2 under 50 reviews up to 22 at 2,000 or more.
Stated job
30%Profile, a size you can measure in millimetres, and whether the sampled reviews show the draught stopping without ruined backing as the main theme.
Price against reliable length
20%Price per stated metre, using a length the listing and the reviews can both support. A contradicted length, or flat tape that does not compress, is marked down.
Listing clarity
10%Each listing starts at 10. Points come off for a unit count, thickness field, material name or length that disagrees with the rest of the page.
Start with the gap you can measure, then the fixing the frame will accept. A stick-on D-seal, a flat foam tape, a rubber D and a push-in uPVC gasket are not interchangeable. Prices below are the amazon.co.uk shelf figures saved on 15 October 2026.
A window seal closes the gap where an opening window meets its frame, or it replaces the rubber gasket that used to sit in a uPVC groove. In the UK the usual jobs are a casement whose bubble has gone hard, and a timber or metal frame that never had a groove. You want the draught gone without a new window. Quality here is the right profile for the gap, a material that springs back, and a fit that still lets the handle lock. A seal is not a lock.
Too thick and the window will not shut, or the lock will strain. Esufeir on a full door perimeter made one lock hard to turn. Measure the closed gap in millimetres and test a 50 mm offcut before you run the whole perimeter.
Leave trickle vents, air bricks, extractors and combustion-air openings alone. Do not draught-proof internal doors. Energy Saving Trust is explicit on both. If you are unsure which vents feed an open flue, stop and ask a fitter.
Foam in a sash channel is the wrong tool. The Centre for Sustainable Energy points to a brush seal or a specialist. Stretching a push-in gasket thins it, and a seal under a glazing bead is a fitter’s job.
Name the gap before you compare strips. A closing gap on a casement, a perished groove gasket, a fixed crack and a sliding sash are different purchases. Foam in a sash channel is the wrong tool. The Centre for Sustainable Energy points to a brush seal or a specialist for sashes. Measure the closed gap in millimetres at more than one point. Too thick and the window will not shut, or the lock will strain. Too thin and the draught stays.
Match the fixing to the frame you have. A stick-on strip goes on a clean, dry rebate when there is no usable groove. A push-in gasket goes in only if a short sample seats in that groove. Do not treat a fits-all uPVC line as settled until it does. Stretching a push-in gasket thins it. Fixtrade’s fitting note is not to stretch the rubber. A glazing-bead seal against the glass goes to a fitter. Length is the perimeter plus waste for corners. YANKUIRUI is 6 m as two 3 m pieces.
Three typical situations, each with a recommendation from this comparison.
The rubber in the groove has gone hard and you can push a new gasket in after a sample fit. Storm Patrol is the 25 m push-in bubble listed for frames of 3–5 mm. Measure the groove first. A frame with no groove is a different product.
You want a same-day stick-on fix and you accept that foam may not last. YANKUIRUI is the top pick here: a 9 mm by 6 mm D-seal for a stated 3–6 mm gap, at about £4.49, with 4.4 from 2,938 ratings.
You need a tape you can take off again, and you should test a corner because some acrylic tapes leave adhesive. wordmouk is flat covering tape for a fixed joint, not a compression seal, and at least one pack was sticky on both sides.
YANKUIRUI is the top pick for a stick-on D-seal with a printed 3–6 mm gap, at about £4.49, with 4.4 from 2,938 ratings. It is the wrong pick for a perished gasket that still sits in a groove. UPSEN is the best value: 10 m at about £4.99, about £0.50 a metre, with 4.3 from 3,025 ratings. GUKOY is cheaper per metre, at about £0.35, and does not take that place, because it is 3 mm flat foam with no stated gap. Storm Patrol remains the listing for a measured 3–5 mm uPVC groove.
UPSEN D-profile foam seal, 10 m, white
10 m at about £4.99, about £0.50 a metre, with 4.3 from 3,025 ratings, the largest review count in this set.
Editorial
Products Compared publishes British-English buying guides based on amazon.co.uk listings and public UK sources. We do not run a lab and we do not invent test scores.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources named in the research digest. Listing prices and ratings are the amazon.co.uk figures saved on 15 October 2026.
Expert source (DIY & tools): Charlie White (Charlie DIYte) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, star ratings and review counts come from those listings and from the public UK sources below. We did not run a laboratory test.
